170 



PISCES. 



Fam. Cyprinodontidae (Toothed Carps). Viviparous. Cyprinndon (Lellaz 

 Cuv.) calaritanus Guv., South Europe ; Andbleps tetropTithalmus Bl., Guiana. 



Fam. Siluridse. Fresh- water fish, usually with broad depressed head, strong 

 dental armature, and skin naked or covered with an armour of bony plates. 

 Siluru* glanis L. (Wels, Waller). The largest river fish of Exirope. Ilypostomus 

 Lac. (Panzerwels) ; Malapterurus electricus L. (Zitterwells), Nile. 



FIG. 6l3.Exocoefus Rondeletii (after Curler and Valenciennes). 



Sub-order 4. Anacanthini. Malacopterygians (soft fins), which 

 with regard to their internal anatomy are allied to the Acantho- 

 pteri by the absence of a ductus pneumaticus ; usually with jugular 

 pelvic fins. 



Fam. OpJiidiidts, OpMdium barbatum L., Mediterranean ; Ammodytes 

 tobianus L., Sand-eel, North Sea. 



Fam. Gadidse. Gadu$ morrhua (the Cod). In Germany dried cod is called 

 Stockfisch, salted cod Laberdan. Cod-liver oil is prepared from its liver. Its 



FIG. 614. GasterosteiiK acu.leatus(& r -ter Hcckei and Kner). 



young (Dorsch) were for a long time considered as a separate species (. 

 callarias}, G. ceglefinus L. Haddock, with a black spot behind the pectoral 

 fin. G. merlangus L., Whiting, coasts of North Europe ; Merluccius vulgaris 

 Flem., Hake, Mediterranean and Northern Seas ; Lota vulgaris Cuv.. Burbot, 

 Eel-pout, Cony fish. A predatory fresh-water fish. 



Fam. Plenronectidse. Flat fishes. The body is compressed, disc-shaped, and 

 strikingly asymmetrical. The side which is directed upwards towards the light 

 is pigmented (with change of colours) ; the other is free from pigment. Both 



